launch_daemon: Fixed NULL events.

* Also, events now can actually be NULL when there is an empty "on"
  field in the settings.
* This fixes a crash, too.

src/servers/launch/BaseJob.cpp

@@ -20,7 +20,8 @@
 BaseJob::BaseJob(const char* name)
 	:
 	BJob(name),
-	fCondition(NULL)
+	fCondition(NULL),
+	fEvent(NULL)
 {
 }
 
@@ -87,7 +88,8 @@ void
 BaseJob::SetEvent(::Event* event)
 {
 	fEvent = event;
-	event->SetOwner(this);
+	if (event != NULL)
+		event->SetOwner(this);
 }
 
 

src/servers/launch/Events.cpp

@@ -92,8 +92,12 @@ static Event*
 create_event(Event* parent, const char* name, const BMessenger* target,
 	const BMessage& args)
 {
-	if (strcmp(name, "or") == 0)
+	if (strcmp(name, "or") == 0) {
+		if (args.IsEmpty())
+			return NULL;
+
 		return new OrEvent(parent, target, args);
+	}
 
 	if (strcmp(name, "demand") == 0)
 		return new DemandEvent(parent);
@@ -356,6 +360,7 @@ FileCreatedEvent::FileCreatedEvent(Event* parent, const BMessage& args)
 status_t
 FileCreatedEvent::Register(EventRegistrator& registrator) const
 {
+	// TODO: implement!
 	return B_ERROR;
 }